In "The Discipline of Innovation" by Peter F. Drucker. Harvard Business Review August 2002 Reprint R0208F:


"To be effective, an innovation has to be simple, and it has to be focused. It should only do only one thing: otherwise it confuses people. Indeed, the greatest praise an innovation can receive is for people to say, "This is so obvious! Why didn't I think of it? It's so simple!" ... Effective innovations start small. They are not grandiose."


http://www.omega-project.info/uploads/9/4/7/3/9473028/_the_discipline_of_innovation.pdf

The four types of innovation require different managerial approaches, because they differ along three important dimensions: the expense of a single experiment, the time frame over which results become apparent, and the ambiguity of results.

Innovation type
Expense of single experiment
Length of each experiment
Ambiguity of results
Continuous process improvement
Smallest
Shortest (could be days)
Clearest
Process revolution
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Product/service innovation
Strategic innovation
Largest
Longest (could be years)
Most ambiguous

Excerpted by permission of Harvard Business School Press from 10 Rules for Strategic Innovators: From Idea to Execution. Copyright 2005 Vijay Govindarajan and Chris Trimble; all rights reserved. Also see referenced in Not All Innovations Are Equal.